Mold for casting metals



Aug. 7, 1928.

1,679,864 G. KOHL MOLD FOR CASTING METALS Original Filed April 13, 1925 2 sheets-sheet 1 Fig.1

H ug, 7, 1923..

PATENT OFlE.

nnonem KUHL, 0F CLEVELAND, OHIO, ASSIGNOB T0 ALUMINUM: COMPANY 0h Amnnren,

09h PITTSBURGH, PENNSYLVANIA, A GORPQBATIUN 0F PENNSYlhWh .1 i

MOLD FOR CASTING METALS.

hppllcatlonfiled. April 113, 1925, Serial No. 22,5'7l. Renewed February as, 1928.

This invention relates to multipart molds of permanent composition for making castings of metal having melting points as high as or higher than aluminum and its alloys.

at More particularly it relates to such molds having the hinged parts provided with hinge members adjustably secured thereto.

llt also relates to a metal mold for casting pistons composed of aluminum alloys for an to internal combustion engine which comprises hingedly connected mold parts provided with hinge members each of which is readily and cheaply adjustable with respect to its respective mold part to compensate for wear, warpta age or resurfacing of the mold part.

Metallic molds for high melting point metals tend to go out of adjustment due to warpage, wear or other causes. in many cases the parts may require resurfacing or m realignment or both to restore the parts to operative condition. When the mo d parts are hinged such restoring measures often necesitates replacement or relocation of the hinges with consequent high expense and loss at of time.

lhe hinge members must be fixedly secured to the mold parts. Heretofore this has been accomplished by theuse of dowels and dowel pins in conjunction with suitable an auxiliary securing means, such as cap screws or the like, since such auxiliary means are not dimensionally accurate enough to serve the purpose alone. The size of the mold part adjacent to the hinge member deteragt mines the number of relocations or replacements of hinges on a mold part with the at tendant boring of new holes for dowels and cap screws, or the like. After a few relocations of a hinge member, the mold parts or an hinge members could no longer be used for such purposes and had to be replaced.

These replacements or relocations were costly themselves and caused expensive delays.

By my invention, however, ll avoid re- ..pa placement of hinge members, the use of dowels and the boring of new holes in the mold for the auxiliary securing means and at the same time provide for the quick, ac-

curate, economical and repeated relocation an of the hinge members. ln certain modifications, such relocation may be accomplished without disassembly of the hinge members from either the mold or hinge pins.

In the drawings attached to this specification and forming a part thereof:

Fig. l is a top plan view of one form ol' mold constructed in accordance with my invention.

hinge embodying my invention.

lln the drawings, 1 indicates the base of a mold on which is mounted two mold halves 2, for lateral movement toward and away from each other. Between the meeting faces of the mold halves 2 is shown a casting cavity 3, a riser cavity a and a gate cavity 5, these cavities being formed by recesses cut or formed in the meeting faces of the mold halves 2. Each mold half 2 has secured thereto at one end a hinge member 6, cooperating with a hinge pin "t. at the end opposite, the mold is provided with a clampmg means comprising a bar 8 and leverh hinged thereto and having a cam surface 10 M on one lower end thereof to cooperate with the outer surface of a plate 11 secured to one mold half 2, the bar 8 being secured to the other mold half 2 as by means of the pin l2. A cap screw may be employed instead of pin l2. When a casting has been made by pouring molten metal into the gate passage 5 and the metal has pased thence into the riser 4t and casting cavity 3 and has solidilied, the mold halves 2 may be opened by moving the lever 9 so that the cam surface 1.0 no longer engages with plate ll and then lifting the lever 9 and bar 8 clear of one mold half. 'llhen the two halves may be moved apart to free the casting and permit removalof the same preparatory to the reassembling of the mold and the making of another casting.

'lhe hinge members 6 are substantially alike and each may be termed a butt corresponding to the term commonly applied. to hinges of the variety used on doors which these members resemble in certain respects. lflach butt 6 is provided with plane sur faces 13 and let which are disposed at right angles to each other to engage with m ltd llll

' screws 17 accomplished by loosening all the cap screws 17.

When because of wear, warpage or resurfacing of the mold halves it becomes necessary or desirable to adjust the butts 6 laterally with respect to the mold halves 2, the cap screws 17 are loosened and shims are inserted between the surfaces 14'and 16.

These shims (not shown) are usually of substantially the same length and breadth as the surfaces 14 and 16 and may vary in thickness from several thousands to perhaps twenty or thirty thousandths of an inch depending on the amount of wear, warpage or resurfacing to be compensated for.

In Figs. 4 and 5 a modified form of my invention is shown where the butts 18 cooperate with a pin 7 and have plane surfaces 19 and 20 positioned at an angle, preferably a right angle, to each other to engage similarly disposed surfaces 21 and 22 on the mold halves. The butts are secured in engagement with surfaces 21 of mold halves 2 by cap screws 23 which fit through enlarged openings 23 and are secured in engagement with surfaces 22 by screws 24. When it becomes desirable to adjust the butts on the molds to compensate for wear, warpage or resurfacing of the molds it is only necessary to remove screws 23 and 24 and butts 18, face ofl surfaces 22 the desired amount and replace the butts and tighten screws 24 and 23.

It will be observed that in each of the fig: ures I have shown a hinge member or butt provided with two plane surfaces to engage a squared corner on the mold part. This construction and such variations thereof 'as will prevent lateral displacement of a mold part with res set to its hinge member, possesses the a vantage over other constructions that no expedients such as dowel pins need be used to fix positively the position of the two parts relative to each other and to maintain the parts immovably secured toet er. g Although I have illustrated my invention as practiced on a mold having two movable mold parts, it will be understood by those skilled in the art that it is equally ap licable to a mold having only .one movab e part. For example, one of the mold parts hereinabove referred to by the reference character 2 should be considered as stationary, the other mold parts could be provided with an adjustable butt as hereinabove shown and would operate satisfactorily without the other mold half being moved. It will also be understood that I may substitute for the butts herein shown, various forms of hinges, including a modification of the pin and bolt type, thereby dispensing with the separate pin ehown herein and designated by character Having thus described my invention so that those skilled in the art may practice the same, I have defined the scope of my invention by what is claimed.

What is claimed is:

1. In a multi art permanent mold for casting metals the combination of a mold part, a movable mold part cooperating with the first said part and exposed to the heat of the molten metal being cast, and a hinge for connecting the said mold parts and secured to the movable mold )art for adjustment laterally with respect thereto.

2. In a multipart metal mold for castin metals the combination of a mold part, an movable mold part cooperating therewith and having a surface to contact with the molten metal being cast, and a hin e for connecting the said mold parts including a laterally adjustable butt removably secured to the said movable mold part.

3. In a. multipart permanent mold for casting metals, the combination of a pair of mold parts adapted to swing apart and having formed in the adjacent faces thereof recesses for reception of the molten metal being cast, a hinge for the said mold parts comprising a pair of butts each secured to one of the said parts and a pin for pivotally connecting the butts together, each of the said butts being laterally adjustable with respect to the mold part to which it is secured.

4. In a multipart metal mold for casting metals, the combination of a mold part, a movable mold part cooperating therewith and exposed to the heat of molten metal being cast, the said movable part being provided at one end with adjacent, plane surfaces disposed at an angle to each other, and a hinge member cooperating with and laterally adjustable with respect to the said surfaces and adapted to be fixedly secured to the said movable mold part in any adjusted position.

5. In a multipart metal mold for casting metals, the combination of a mold part, a movable mold part cooperating therewith and exposed to the heat of molten metal being cast, the movable mold part being provided at one end with adjacent, plane surfaces disposed at right angles to each other, a hinge having perforated members engaging with each of the said surfaces, and connecting the mold parts, and means for adjustably securing one of the said perforated members to the movable mold part, comprising securing members passing through perforations in the hinge member, certain of the said securing means having smaller diametrical dimensions than the corresponding dimensions of the perforations through which the means extend.

6. In a multipart metal mold for casting internal combustion engine pistons composed of high melting point metals, the combination of a mold base, two mold halves mounted to swing on the top of the mold base and each provided at one end with adjacent, plane surfaces disposed at an angle to each other, and a hinge connecting the mold halves, comprising butts adjustably secured to each mold halt in cooperation with the aaid end and side surfaces and a hinge pin joining the butts.

7. In a multipart metal mold for casting pistons composed of high meltin point metals, the combination of a mold base, two mold halves mounted to swing on top of the mold base and each provided at one end with adjacent, plane surfaces disposed at right angles to each other, and a hinge connecting the mold halves, comprising butts adjustably secured to each mold half in cooperation with the said surfaces, and a hinge pin joining the butts, each butt having in the portion thereof adjacent to one of the said surfaces of the mold half, perforations for securing means of enlarged diameter as compared with the diameter of the securing means.

In testimony whereof I hereunto afiix my signature this 1st day of A ril, 1925.

GE RGE KOHL. 

